East London art gallery showcasing contemporary art from Europe's Eastern Bloc.

This former medical factory gives home to cutting edge arts in the shadow of a gas works.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

This strange geological landscape erupts with sudden bursts of water.

This single room has survived the centuries with almost no deterioration.

Hear the quietest sound from across the dome.

Rebuilt remains of a temple to Roman god Mithras.

The largest of London's subterranean rivers and once a mad, bad center of London life.

Hidden beneath the streets of London is a secret subway that only carried mail.

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

A micronation of epic proportions.

By standing on a particular paving stone in the courtyard, you'll hear an echo that shouldn't be.

The unique ecosystem atop an Australian mountain is home to some colorful inhabitants.

A seemingly endless landscape of pure salt stretches far across Bolivia.

This deceptively salty lake looks like blushing pink lemonade.

An Australian lake whose pink hue defies scientific explanation.

Alien rock formations grown from the sands of an Australian national park.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

The rocks in this arid basin leave trails of movement behind them.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

The tallest stationary dunes on Earth also happen to sing.